[souffle]

In my opinion if she were to become unable to eat and move around and was just lying there but still breathing that would be critical and you would need a vet to release her from any pain urgently. They can linger some time in that situation. What is she currently like? Is she happy and doing hamstery things? A pyometra can sometimes rupture or as toxins build up in the system they do become very ill.
I don't know what she is like currently so I can't really judge however if you have any concerns I would have a recheck as I know our vets are closed from 3 on Xmas eve then emergency only really until the Monday. Emergency out of hours at our vet is £170
consultation!